From mboxrd@z Thu Jan  1 00:00:00 1970
From: andrew@user2.teleport.com (Andrew Klossner)
To: help-gcc@gnu.org
Subject: Re: PowerPC Stack Frames
Date: Mon, 06 Dec 1999 13:06:00 -0000
Message-id: <82h88r$hjm$1@user2.teleport.com>
References: <82gpv3$bjn@sirius.develcon.com>
X-SW-Source: 1999-12/msg00089.html

> I am using egcs-2.91.66 for a PowerPC.  I would like
> some help understanding how registers and the stack are used
> on PowerPC with GCC.

It depends on which ABI you're using.  If it's the EABI (Embedded):
You have to save GPR registers 0 and 3-12, LR, CTR, XER, and CR.  If
the C routines you'll call use floating point, you must also save FP
registers 0-13 and FPSCR.  The C routines will save/restore anything
else they use.

  -=- Andrew Klossner (andrew@teleport.com)

From mboxrd@z Thu Jan  1 00:00:00 1970
From: andrew@user2.teleport.com (Andrew Klossner)
To: help-gcc@gnu.org
Subject: Re: PowerPC Stack Frames
Date: Fri, 31 Dec 1999 22:24:00 -0000
Message-ID: <82h88r$hjm$1@user2.teleport.com>
References: <82gpv3$bjn@sirius.develcon.com>
X-SW-Source: 1999-12n/msg00089.html
Message-ID: <19991231222400.NetkuS2a5ySLXs7NH1_Nto0HAzyUiGpIibn4K5FC-9U@z>

> I am using egcs-2.91.66 for a PowerPC.  I would like
> some help understanding how registers and the stack are used
> on PowerPC with GCC.

It depends on which ABI you're using.  If it's the EABI (Embedded):
You have to save GPR registers 0 and 3-12, LR, CTR, XER, and CR.  If
the C routines you'll call use floating point, you must also save FP
registers 0-13 and FPSCR.  The C routines will save/restore anything
else they use.

  -=- Andrew Klossner (andrew@teleport.com)